diff --git a/pipenv/_compat.py b/pipenv/_compat.py
index d6ae5644..6769d8d4 100644
--- a/pipenv/_compat.py
+++ b/pipenv/_compat.py
@@ -9,7 +9,7 @@ import io
 import os
 import six
 import warnings
-from tempfile import _bin_openflags, gettempdir, _mkstemp_inner, mkdtemp, _text_openflags
+from tempfile import _bin_openflags, gettempdir, _mkstemp_inner, mkdtemp
 from .utils import (logging, rmtree)
 
 try:
@@ -258,13 +258,12 @@ def NamedTemporaryFile(
     if os.name == "nt" and delete:
         flags |= os.O_TEMPORARY
     if six.PY2:
-        flags = _text_openflags if 'b' not in mode else flags
         (fd, name) = _mkstemp_inner(dir, prefix, suffix, flags)
     else:
         (fd, name) = _mkstemp_inner(dir, prefix, suffix, flags, output_type)
     try:
         file = io.open(
-            fd, mode, buffering=buffering, newline=newline, encoding=encoding
+            fd, mode, buffering=buffering, newline=newline, encoding=encoding,
         )
         return _TemporaryFileWrapper(file, name, delete)